Rear passenger USB C issue

[Nephron]

In an attempt to utilize the rear passenger USB-C ports for charging, I have encountered intermittent power supply issues. Initially, I suspected a cable malfunction, but this problem persisted despite using three distinct cables. However, the charging function is consistent when using the same cables in the front seats. Notably, the ports occasionally become functional without any apparent cause.
Is it like there's pressure sensor on rear seats ? when occupied it enables the charging ports to operate.